<p>Hi and welcome to CC! </p>
<p>First, your question is one of the most frequently asked here on the Yale forum. If you use the Search function (upper right) and type in ‘SCEA’, you’ll get many threads that discuss this topic and will give you some good background and views.</p>
<p>Second, beyond the odds of getting accepted to Y SCEA, IMO you need to consider your options for applying to any early admissions in the context of an application strategy. For instance, if for monetary reasons you’re not planning to apply ED anywhere, and Y is your only top choice that has EA, then it might make sense to apply SCEA. However, if for instance, MIT and UChicago are also top choices and Y is a longshot given your gpa, test scores, etc., then you might want to do EA at both of those schools and RD for Y.</p>